class Oneday:
    breakfast:str
    lunch:str
    dinner:str

    def eat1(self):
        self.breakfast="豆浆和流沙包"
        print("早餐吃"+self.breakfast)


    @classmethod
    def eat2(cls):
        cls.lunch="番茄小馄饨"
        print("午餐吃"+cls.lunch)


    @staticmethod
    def eat3():
        Oneday.dinner="麻辣香锅"
        print("晚餐吃"+Oneday.dinner)




a=Oneday()
a.eat1()
a.eat2()
a.eat3()